Sash-pulley



(No Model.)-

H. L. BLODGETT.

SASH PULLEY. No. 329,006. Patented Oct. 27, 1885.

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HENRY L. BLODGETT, OF CHICAGO, ILLINOIS.

SAEH-PULLEY.

Q:' PECIFICATION forming part of Letters Patent P10329306, dated October 27, 1835.

Application filed A; ril 16, 1884. Serial No. 128,053. (No model.)

To all whom, it may concern.-

Be it known that I, HENRY L. BLoneETT, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sash-Pulleys; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and

to the letters of reference marked thereon,

which form a part of this specification.

This invention relates more particularly to the construction of the shells or cases of sashpulleys, and has for its objects to lessen the cost of production and to facilitate the appli cation of the pulley to window-frames, and at the same time to insure reliable action of the article when put to use. To these ends the invention consists in the several matters hereinafter set forth, and pointed outin the claims.

The invention is herein shown as embodied in a sash-pulley composed of alongitudinally and vertically divided shell having two rela tively small wheels or pulleys proper, one be hind the other, by which the desired horizon tal distance is obtained between the vertical portions of the sash-cord. This construction enables the case to be made vertically shallow as compared with those having but one wheel or pulley of large enough diameter to give the required distance between the said vertical parts of the cord, and such shallow shell in turn enables the face-plate to be made circu lar, and at the same time not too wide for admission between the stops or fraineguides for the sash to which a given pulley is suited.

The face-plate being circular, the recess therefor in the window-frame may, of course, be cut by a center-bit, and the labor of applyingthe pulley as awhole to the window is therefore greatly lessened. \Vith reference to the same purpose of facilitating the application of the pulley, the body of the shell is formed with its upper and lower margins or walls externally semi-cylindric, so that after cutting the recess in the frame for the faceplate by means of a centerbit, as above stated, the mortise for the body of the shell may be made by boring two holes, one above the other, of size to conform to the said margins of the shell-body, and cutting out the intervening wood with a chisel. By forming the circular face-plate of definite size the use of a correspondingly-sized center-bit to cut the recess insures perfect accuracy of fit between the edges of the face-plate and the wood.

A feature of the invention herein shown consists in the construction of the shell of metal cast in halves, with not only the holes for the pulley-wheels and joining-rivet, but also slots in the lateral edges of the faceplate for the screws by which the shell is secured to the window-frame. Thus constructed the pulley-shell requires no drilling whatever for any purpose, and the cost of its production or manufacture is greatly reduced. By casting the pulleys with trunnions all hand or ma chine work is rendered unnecessary in the entire structure, except simply in inserting the rivet which holds the halves of the shell together.

In some instances a brass face will be applied to the face-plate after the parts of the shell have been joined, and the front or outer pulley-wheel may be made of brass, while the body of the shell and the rear pulleyavhecl may be of iron.

I In the accompanying drawings, Figure l is a top view. Fig. 2 is a front elevation, and Fig. 3 is a side elevation of the complete device having the shell made in halves. Fig. 4: is a horizontal section on the line x as of Fig. 3. Fig. 5 shows the two parts of the shell detached. Fig. 6 is a section in the line a: w of Fig. 3,-showing a sheet-metal facing applied to the exposed surface of the face-plate. Fig. 7 is a front View of the facing.

A is the shell or case,which, when completed, is oblong in a vertical transverse section, is seini-cylindric on its upper and lower margins, and is provided with a circular face-plate formed of the same piece with the shell or pulley-tube. The shell with the face-plate is cast in halves a and a, the division being made in a central vertical longitudinal plane, as shown. Each halfis therefore of suitable form to draw properly in molding. The holes for the pulley-wheel pivots, together with bosses or hubs a surrounding said holes, are cast in the several parts of the shell, as are also the holes a" for the cross-bar or rivet by which the opposite halves of the shell are joined, and the marginal slots a,in countersunk form,

as shown, complete and entirely ready to admit the screws by which the shell is secured in the window-frame.

For the purpose of bringing the parts of the shell accurately together in all directions,

inclined walls, which, while insuring the proper effect in directing the parts accurately together in all directions, also favor the drawing of the patterns for said parts from the sand in molding. Thus constructed the accurate connections of the parts a and a of the shell by means of a rivet, O,isa work requiring little skill, and one that may be performed very rapidly.

In the circular face -.plate of size to enter between the frame-stops of a Window calling for a given size of pulley it is necessary to provide screw-holes in the face-plate at the sides thereof, because there is no room at the top and bottom, and to provide such screwholes in the act of casting I make them in the form of open slots, as indicated, but preferably a little shallower than shown, in order that the screw-heads may extend to the edge of the plate, and thus cover or fill the slot more perfectly.

The wheels B are commonly cast with the trunnions b thereon,of proper size and length to fit the holes therefor in the shell, and to extend no more than flush with the outer surface of said shell. By making the hubs a on the shell, instead of on the wheels, the desired freedom and noiselessness of the pulleys are secured, and at the same time the length of the wearing or bearing surfaces for the trunnions is increased to the maximum.

E is a sheet-metal facing, usually of brass, struck 'up with a marginal flange or flanges, e, to partially or wholly surround the edge of the face-plate, and with screw-holes c and a central opening, e coincident with the aperture for the wheel and sash-cord. The edges of the face-plate may be cylindrical, and the flange or flanges e of the facing E may be bent over on the back side of the face-plate, as shown in dotted lines; or the edge of said faceplate may be conical or inwardly tapered toward the rear and the flange 6 simply contracted about said edge. In case the beveled form of edge is employed, the face-plate may be made to fit the recess cut in the frame therefor very closely. The facing E, whether pressed or cast,'may have circular screw-holes, instead of slots, and will thus perfectly hidethe outer and unoccupied portion of slots in the face-plate which it covers.

In the case of the face-plate being faced with 6 brass or other ornamental metal facing E, the front or outer pulley-Wheel, B,will commonly be of metal corresponding to the faeing,while the rear wheel, B, is, like the shell, of castiron. The product is thus made ornamental without material increase of cost.

In another' application for patent I have described a pulley-shell provided with a circular face-plate, and have also therein illustrated the feature of the circular face plate extending above the upper margin of the tubular part of said shell.

I claim as my invention 1. Acast-metal sash-pulley shell cast in two lateral halves composed of the body portions a and a and parts A of the face-plate, said body portions being cast with mutually-en gaging projections and recesses on their meeting edges, and the parts of the face-plate being both cast with a marginal. slot at right angles to the plane of division of the shell to receive a holding-screw, which slots are of depth sufficient to admit the screw-heads entirely within the circumference of the faceplate, substantially as shown, and for the pur- 9c poses set forth.

2. A longitudinally and vertically divided sash-pulley shell and face-plate having its parts cast with mutually-engaging projections, and recesses adapted by themselves alone to bring the said parts into proper coincident position when being put together, and also cast with opposite bossed apertures for the wheel-trunnions, and with opposite holes for the connecting-rivet, and also with marginal O countersunk slots in the face-plate portions to admit the holding-screws, in combination with a wheel having its trunnions integral therewith, substantially as shown and described.

In testimony that I claim the foregoing as my invention I affiX my signature in presence of two'witnesses.

HENRY L. BLODGETT.

Witnesses:

M. E. DAYTON, OLIVER E. PAGIN. 

